Estimation of lifetime attributable risk incidence and mortality for breast cancer attributed to computed tomography of the head in the Niger Delta Region of Nigeria

Egyptian Journal of Radiology and Nuclear Medicine

Table 10 Estimates of lifetime attributable risk (LAR) of breast cancer mortality

Age at exposure (years)	LAR mortality per 100,000 population
	Centre G1				Centre G2
	Minimum	Maximum	Mean	Approximate risk	Minimum	Maximum	Mean	Approximate risk
20–29	3.24	8.82	6.25	1 in 16,000	0.86	2.18	1.55	1 in 64,516
30–39	1.75	4.73	2.59	1 in 37,692	0.31	1.33	0.70	1 in 142,857
40–49	0.18	2.75	1.33	1 in 75,757	0.17	0.75	0.47	1 in 312,577
50–59	0.31	1.00	0.60	1 in 166,667	0.12	0.38	0.24	1 in 416,667
60–69	0.17	0.63	0.29	1 in 333,333	0.03	0.13	0.09	1 in 1,111,111
70–79	0.04	0.36	0.22	1 in 454,545	0.03	0.18	0.07	1 in 1,428,571
80–89	0.02	0.13	0.07	1 in 1,428,571	0.03	0.03	0.03	1 in 3,333,333
Overall	0.02	8.82	1.73	1 in 57,143	0.03	2.18	0.35	1 in 285,714